Improve mining timeout

[Neylix]

Description

Improve mining timeout with a reference timeout. As it all the nodes will have the timeout at the same time.
Also placed prior validation after building context
Also updated the mining timeout with new values based on new smart contract validation

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Started 3 nodes, launched some benchmark, it worked well.
Stopped one and did some faucet, it worked well after coordinator or context timeout

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules